| Abstract |
The paper presents a new digital method of controlling a q-pulse converter. Among others two major questions are considered. The first one-generation of phase control angle delta-alpha of the values: zero, plus, minus. The following factors have been taken into account: possibility of introducing absolute values of alpha-angle from microprocessor system, possibility of the cooperation with a PID controller of analog or digital structure, with single reference voltage of the shape of saw or cosine curve, of output function generated in analog or digital way, of alpha-max settings control, of limiting plus/minus delta-alpha-max increments. The time of controller reaction to input function is externally comparable with the one of a classical analog controller. The second one-generation of optimum shape of the thyristor gate current. The digital controller constructed according to the proposed method has the following qualities: alpha-angle increment dynamics of the range 90°/network period, alpha-angle resolutlon below 0 05°, simple interface controller-microprocessor system. |
